ISO 20672:2022 pdf download – Ships and marine technology — Rate of turn indicators. 4.4 Illumination and lighting The illumination and lighting of the indicator shall be arranged in order not to hinder an operator’s vision at night and in order to make the scale, pointer and letters as equally visible as possible even in dim light or darkness. 4.5 Type of indicator The rate of turn indicator shall be an analogue-type indicator. A digital-type indicator may additionally be used, if fitted. If a display is used for presentation, the equipment shall comply with MSC.191(79), as amended by MSC.466(101), and...